Murata Manufacturing Co., Ltd. has been developing the EMI suppression
device market since the invention of 3 terminal capacitor DS310 series in
1979. Also, we have been striving to develop and popularize new noise
countermeasure technologies as well as new products in the concept of
"Develop unique products," to become our customer’s best solution partner.
We hope you can find the key solution to your noise problem.
Explanation of symbols
in this catalog
All Products
Features of each series
Features of each item
New product
Flow soldering available
Flow OK
Exist in design kit
Rated current 1A or more
Reflow
Reflow soldering available
Rated current 3A or more
Rated current 10A or more
Meets large current lines
OK
Chip Ferrite Bead
Meets high frequency noise
up to 1-2GHz
Meets ultra high frequency noise
up to 10GHz
LC Combined Type Filter
Chip Common Mode Choke Coil
Low cut-off frequency type for UHF band
noise, which affects digital TV tuner
For high speed differential signal lines
(USB2.0/LVDS/IEEE1394 etc.)
For ultra high speed differential signal lines
(HDMI/DVI/Display Port/USB3.0 etc.)
Line impedance has been matched to
transmission lines
EU RoHS Compliant
All the products in this catalog comply with EU RoHS.
EU RoHS is "the European Directive 2011/65/EU on the Restriction of the Use of Certain
Hazardous Substances in Electrical and Electronic Equipment."
For more details, please refer to our website 'Murata's Approach for EU RoHS'
(http://www.murata.com/info/rohs.html).
!Note
• Please read rating and
!CAUTION
(for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
2
CONTENTS
Selection Guide for Noise Suppression Filters
············
EMI Filter Selection by Application
····························
aDigital
Still Camera
······
4
aBlu-ray/DVD
···············
6
aSmartphone
·········
5
aLCD-TV
···············
7
2
4
EMI Filter Selection by Circuits and Noise Frequency
(for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
· With effect as By-Pass capacitor (Lineup for Power)
· Good noise separation from signal (LC filter for Signal)
· Effective at high impedance line
· Application set with higher
noise radiation
· High impedance line
· Circuit with By-Pass capacitor
· Circuit driven by high
frequency
Common Mode
Choke Coil
· Possible to suppress noise with less affect of ultra
high speed signal
· Great effect for common mode noise
· Less magnetic saturation by current
· High speed differential
signal line
· I/F cable driver
· Power line
oExample
Common Mode Choke Coil
Suppresses common mode noise.
Ferrite Bead Inductor
Suppresses differential mode noise.
Common Mode Choke Coil
Suppresses common mode noise.
Vcc
DC power supply
input section
USB/IEEE1394
GND
Three-terminal Capacitor
Suppresses differential mode noise.
!Note
• Please read rating and
!CAUTION
(for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
2
Selection Guide for Noise Suppression Filters
oAdvantages
to Using Common Mode Choke Coils
1. Great Effect for Common Mode Noise
Differential mode inductors work as a half
impedance for common mode noise.
Common Mode Choke Coils are effective for
common mode noise.
Ex) 2pcs of differential mode inductor
Z
~
Z
Load
Noise source
N
Stray
capacitance
Reference ground surface
Stray
capacitance
2. Possible to Suppress Noise with Less Affect of Ultra High Speed Signal
Common Mode Choke Coils can suppress Noise with less affect of Signal,
even if the frequency range of Signal and Noise are the same, because
they separate each conductive mode of current.
Signal spectrum
(Differential mode)
Noise spectrum
(Common mode)
Using differential mode
inductor
Signal is attenuated
with Noise suppression
Frequency
Frequency
Using Common Mode
Choke Coil
Noise is suppressed
with less effect on
Signal
Frequency
3. Less Magnetic Saturation by Current
Common Mode Choke Coils are effective for noise suppression of DC
power lines, due to their less magnetic saturation at high power current,
that comes from their construction of cancelling magnetic flux of differential
mode current at each coil.
!Note
• Please read rating and
!CAUTION
(for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
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